Indeed, the localization ID is not build specific, however, you can achieve this by following the steps below:
- create a new property related to each build (i.e. PROP_BUILD1, PROP_BUILD2) and localize it to the values you need (you can do this in the "Translations" page, "Project Strings" tab if you use the "Select..." button and check the "Properties" segment)
- set your default property (i.e. MY_PROP) to use the value of the above properties per build
- right-click in the "Value" field of the default property, select "Localization..." and check the "Never translate this string" option
- build and run the project
I attached a sample project which implements this scenario, so you can take a look of its configurations.